Bengal designs and manufactures high-quality fabricated pipe spools engineered for critical industrial applications requiring exceptional dimensional accuracy, weld integrity, and reliable performance. Our pipe spools are manufactured to customer drawings and international standards, ensuring seamless installation and long-term operational reliability.
Equipped with an advanced 5-axis CNC pipe bending machine, we offer precision cold bending of pipes from ½” to 6″ nominal diameter (NB), enabling complex multi-plane bends with high repeatability while minimizing welded joints and improving system integrity.
From standard piping assemblies to complex engineered pipe spools, Bengal delivers precision, flexibility, andmanufacturing excellence for the oil & gas, power, hydrogen, cryogenic, chemical, aerospace, railway, and processindustries.
| Component | Material |
|---|---|
| Inner Pipe | Stainless Steel SS 304 / SS 316L |
| Outer Jacket | Stainless Steel SS 304 / SS 316L |
| Bayonet Male Assembly | Stainless Steel SS 304 / SS 316L |
| Bayonet Female Assembly | Stainless Steel SS 304 / SS 316L |
| Insulation | High Vacuum with Multi-Layer Insulation (MLI) |
Bayonet Connections are available for:
Custom sizes can also be manufactured as per customerspecifications.
Bengal Industries offers a wide range of cryogenic transfer pipes and hoses designed for the safe and efficient transferof liquid cryogens. These systems are suitable for handling liquid helium, liquid nitrogen, liquid argon, liquid oxygen,and LNG.
The product range extends from simple non-jacketed flexible transfer lines to fully vacuum-insulated piping systemsrequired for transferring liquid helium and other cryogenic fluids. Manufactured from high-quality stainless steel, thesetransfer systems are suitable for laboratories, industrial plants, research facilities, and instrumentation applications.
Bengal Industries specializes in the design and manufacture of complete cryogenic fluid transfer, control, and storagesystems tailored to customer-specific applications.
Stainless Steel Rigid and Bendable Vacuum Jacketed Pipes are low heat-leak, high-performance vacuum-insulated pipingsystems designed for transferring cryogenic liquids such as liquid nitrogen and other liquefied gases.
The piping is manufactured in easy-to-assemble sections using bayonet connections. Vacuum Jacketed Pipes are safe totouch, significantly reduce frost formation and condensation, and improve on-site operational safety.
| Inner Pipe Size (DN) | Outer Pipe Size (DN) | Pipe Material | Heat Leak Rate (W/m) |
|---|---|---|---|
| 1/2″ | 1½” | AISI 304 or 316L | 0.31 |
| 1″ | 2″ | AISI 304 or 316L | 0.43 |
| 1½” | 3″ | AISI 304 or 316L | 0.54 |
| 2″ | 3½” | AISI 304 or 316L | 0.72 |
| 3″ | 5″ | AISI 304 or 316L | 0.94 |
Vacuum Jacketed Pipes are constructed with a heat bridge at both ends to maintain a vacuum-tight joint between theinner and outer pipes.
The extended heat-transfer path provided by the heat bridge minimizes thermal conduction, reducing heat ingress intothe cryogenic fluid. It also compensates for the relative movement between the inner and outer pipes caused by thermalexpansion and contraction during operation.
The segmented Heat Bridge design further facilitates easy field welding of long cryogenic pipeline systems whilemaintaining thermal efficiency.
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